Don't like EA's new monetized, free-to-play version of Dungeon Keeper? Then how about snagging the original Dungeon Keeper for free? For the next 48 hours, GOG.com has Dungeon Keeper for absolutely free.

Dungeon Keeper is a real-time strategy game originally developed by Peter Molyneux when he was at Bullfrog Productions that pits players as the evil bosses of RPG dungeons. Your job is to build the best dungeon to keep your treasures away from those pesky heroes who mean to steal them and kill your hard-earned minions.

Even if you aren't sure you'll ever play this classic game, I still say snag it now for free whilst you can.

For anyone who does pick this up I strongly recommend getting 'Keeper FX'.
It lets you play the game in higher resolutions and replaces the old dated textures.
DK is still a pretty good game, graphics aside I don't think it has dated that badly.